Van Teeseling, a wealthy and influential banker, is found unconscious in his car on the beach. He tells police that the night before he and his wife went for a drunken midnight swim. His wife drowned while he barely escaped with his life. Van der Valk's nose is twitching, but he is put under pressure not to pursue the case. When Kroon discovers than van Teeseling is a former Olympic swimmer, van der Valk is convinced that he staged the incident to get rid of his wife. Van der Valk is determined to use any means to ensure that justice is done.

A dead man appears on a canal barge.

A private detective is stabbed to death.

A visiting American fears for the safety of her lover who has gone missing.

A search for a missing teenager finds her tycoon brother unwilling to help.